Operating Systems General Concepts Interview Questions
Questions Answers Views Company eMail

What is Difference between thread and process?

Samsung, HCL, Goldman Sachs, Encora, Microsoft, HP, AirTies, Azingo, Bloomberg, MES,

28 242884

How to communicate between difference process?

HP, IBM,

2 6080

What is the best way of communication in multi process environment? ex: getting log from different applications from multi servers?

HP,

1 2299




What is scheduling and How it effects the processor efficiency?

HP,

2 2444

What is virtual memory, if OS didt have that concept What are the problems can arise?

HP,

6 11704

What is the best suited algorithm to avoid internal fragmentation?

HP,

2 6119

How to escape from external fragmentation?

HP,

2 2831

What is difference in managing processes in windows, unix, RTOS?

HP,

1611




What is the difference between mutex and semaphore?

Microsoft, HP,

14 48994

What are counting semaphores?

IBM, HP,

4 10136

which is best among semaphores and mutexes?

HP,

2 4690

which is best among pipes, queues, shared memory and why?

HP,

2 4051

What are named pipes?

HP,

3 3474

What is the signal?

HP,

1 2626

What is the highest priority software interrupt?

HP,

1 3236


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Un-Answered Questions { Operating Systems General Concepts }

Measurements of a certain system have shown that the average process runs for a time T before blocking on I/O. A process switch requires a time S, which is effectively wasted (overhead). The CPU’s efficiency is the fraction of its time its spends executing user programs, i.e., executing user processes. For round robin scheduling with quantum Q, give a formula for the CPU efficiency for each of the following: (a) Q = ∞ (b) Q > S + T (c) S

2430


Hi All, Can any one post a MS-DOS command/ utility tool, that modifies large size(nGBs) log file into MBs form the begining of log file? I will appreciate if any one give correct answer to this question. Thanks

766


Give the disadvantages of Havander's Strategies.

1256


Explain what is meant by repetition of information and inability to represent information. Explain why each of these properties may indicate a bad relational database design.

1658


what is the relationship between page size and page table?

1269






How do an incremental process model and certification work together to produce high quality software? In your own words, describe the intent of certification in the clean room software engineering context.

659


what is difference between xp & 2003?

786


WHATE IS DIFFERENT BETWEEN ANLOG , PLC & DCS OR EXPLAIN ANALOG / PLC / DCS SYSTEME

1650


How does agile communication differ from tradition software engineering communication? How it is similar?

698


Why is it that a single, all – encompassing metric cannot be developed for programme complexity or programme quality?

837


What is the multi-treade and models (explain each models)?

1900


Which one you will use to implement critical section?

977


Write syntax to set JVM Memory as min-256Mb & max 512Mb?

1807


what's the latest ram lunch?

1559


what are the softwares helping for auditing poblems?

860